The present invention relates to compounds having dual pharmacological activity towards both the sigma (σ) receptor, and the μ-opiod receptor and more particularly to piperazine compounds having this pharmacological activity, to processes of preparation of such compounds, to pharmaceutical compositions comprising them, and to their use in therapy, in particular for the treatment of pain.本發明係關於具有針對σ受體及μ-類鴉片受體兩者之雙重藥理學活性的化合物,且更特定言之,關於具有此藥理學活性的哌化合物,關於製備此類化合物之製程,關於包含其之醫藥組成物,且關於其在療法中之用途,詳言之用於疼痛治療。